Another major milestone arrives Monday in American Airlines Inc.’s bankruptcy case as creditors and other stakeholders face a 4 p.m. Dallas deadline to vote on a plan to reorganize.

That plan for American and parent AMR Corp. includes a proposed merger with US Airways Group Inc., which would take effect when American and AMR Corp. exit U.S. Bankruptcy Court.

“Our proposed merger with US Airways … has the support of many of our stakeholders,” American spokesman Mike Trevino said Friday. “We hope to see that support reflected in the voting, once the final tabulation is complete.”

Results may be made known soon after the deadline. However, the parties must submit a final count to Bankruptcy Judge Sean Lane by Aug. 8.

That’s a week before Lane is scheduled to hold a court hearing in his lower Manhattan courtroom Aug. 15 on whether to confirm the plan.

If he approves, American and AMR will finally wrap up the case they filed on Nov. 29, 2011, 20 months ago.

To be approved, the plan must receive support from a majority of individuals or companies voting on the plan. In addition, there’s a weighted vote: Two thirds of the dollar value in each class of stakeholder must vote in favor for the plan to pass.

The plan calls for unsecured creditors to be repaid in full. And, in a rare outcome, the current holders of AMR common shares will get at least 3.5 percent of the stock in the new AMR, to be called American Airlines Group Inc., after it merges with US Airways.

The percentage going to AMR shareholders could increase, assuming creditors are repaid in full.

As a rule, common shares in a company are canceled out after a Chapter 11 bankruptcy filing, with nothing for the previous shareholders.

The merger, announced Feb. 14, already received overwhelming approval from US Airways shareholders in a July 12 vote.

Antitrust officials in Europe and the United States are reviewing the proposal for impacts on competition, with the Europeans set to decide by Aug. 6 whether the deal is OK.

American and US Airways have offered to give up enough takeoff and landing rights at London’s Heathrow Airport so that another airline could fly the Philadelphia-Heathrow route. Currently, only US Airways and American’s trans-Atlantic partner, British Airways, have flights on that route.

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